Question 820919
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Hi,
3x+4y=31
<u>2x-4y=-6</u>   |Adding EQs so as to eliminate the y variable
    5x = 25
     x = 5  and y = 4   ( 4y = 31-15, 4y = 16, y = 4)
CHECKING our answer***using:  2x-4y = -6
 10 - 16 = -6